Charge, current, and potential difference
Charge is a property, current is charge flow rate, and potential difference is energy per unit charge. Keep these definitions distinct.
Greek Gymnasium Grade 3 / Physics / Curriculum
Ηλεκτρική δύναμη και φορτίο: structured theory, worked examples, answered practice, and a mastery checklist for Greek Gymnasium Grade 3.
Unit
The essential chapter ideas in a clear sequence before practice.
Charge is a property, current is charge flow rate, and potential difference is energy per unit charge. Keep these definitions distinct.
Draw a closed circuit with correct symbols. Apply charge conservation at junctions and energy conservation around loops where required.
Field lines indicate direction and relative strength. In induction, changing magnetic flux is linked to induced potential difference.
Physics
Follow the method step by step and check why every step is valid.
A 5 Ω resistor is connected across 15 V. Find current and power.
Physics
Connect formulae to phenomena, write units correctly, and explain results.
The structure follows the official textbook layout and is used to organise study.
The areas that usually create mistakes or need extra revision.
I = 3 A, P = 45 W
Before calculating, explain the key idea from “Ηλεκτρική δύναμη” and which conditions must be checked.
The answer should show not only which rule is used for “Ηλεκτρική δύναμη”, but also why it is valid here.
Ηλεκτρική δύναμη και φορτίο
Try independently, use the hint if needed, then open the answer guide.
1. Explain the idea and give one correct foundation example for “Ηλεκτρική δύναμη”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Ηλεκτρική δύναμη” to a physical law or model, correct units, and an interpretation.
2. Solve an application and show every intermediate step for “Ηλεκτρικό φορτίο”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Ηλεκτρικό φορτίο” to a physical law or model, correct units, and an interpretation.
3. Compare a correct and an incorrect approach and justify the difference for “Ηλεκτρικό φορτίο στο εσωτερικό του ατόμου”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Ηλεκτρικό φορτίο στο εσωτερικό του ατόμου” to a physical law or model, correct units, and an interpretation.
4. Create a short exam-style question and check your answer for “Ηλέκτριση με τριβή, επαφή και επαγωγή”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Ηλέκτριση με τριβή, επαφή και επαγωγή” to a physical law or model, correct units, and an interpretation.
Where to start: textbook, daily material, PDFs, videos, and worked examples.
Targeted practice before full tests so coverage is clear.
How to measure progress in this chapter and when it enters a cumulative mock.
What to do after finishing the chapter and how it connects to the next unit.
Note: for the official examinable syllabus of each school year, always confirm with the school, tutor, and current Ministry/IEP announcements.